import type { EventEnvelope } from '../../domain/observability/events/event-envelope.js';
export interface CostSummary {
    readonly durationMs: number;
    readonly tokensUsed: number;
    readonly apiCalls: number;
    readonly eventCount: number;
}
export declare function aggregateCostByTaskId(events: readonly EventEnvelope[]): ReadonlyMap<string, CostSummary>;
export declare function aggregateCostByCorrelationId(events: readonly EventEnvelope[]): ReadonlyMap<string, CostSummary>;
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